Dumbturner for sugar-cane mills



Mar. 13, 1923. y

1,448,557 c. MCNEIL DUMBTURNER FOR SUGAR CANE MILLS Filed July 26, 1922Flag/ -A- 2 sheets-sheet 1` y bis rrorneys Mar. 13, 1923.

C. MCNEIL DUMBTURNER FOR SUGAR GANE MILLS r, Gus' Filed July 26, 1922 2sheets-sheet 2 MMM Patented Mar. 13, 1923.

CHARLES MONEIL' 0F "GLASGOW, SCOTLAND.

Be it known that I, CHARLES MCNEIL,` B. Sc., a British subject, andlamresident of Glasgow, Scotland, engineer, have invented certain newand useful Improvements in Connection `with Dumbturne forisugan; CaneMills, of which the fo lowing `is the specification.

This invention relates to the dumbturners 'and bars for carrying same,`placedbetwleen the two lower rolls of athree-roll sugarcane niill todirect the cane through-,the Ini1l,-the

parts-being adjustable relativelyto themolls by wedges carried by boltsand acting Ybetween parts on Leach side of eachendiof-tlie bar andprojections on the housingsjof the mill, the carrying bolts being,radjustably hcld in the housing so thatthey pass downwards from thewedges, Asrusually con.`

si ructcd, the dunibtumer `plate is checked on its under side into theupper surfaces of its `carrying bar so that it and ttlieicarrying bararemoved together as onepiece to or from the front rollaon movement ofthe Aadjustiner wedges and the invention has for its objecttto improvethe` construction ,of`

the dumbturner plate and carrying barfso that the dumbturner plateitself may be sepa-` rately adjustable relatively to the rolls,irrespective of the `adjustment of the carry-a` ing bar, the inventionbeing applicable `to either the rocker bar type of dnmbturnervor to whatis known us the fixed bar type.

A dumbturner made according to the inadjustably held as usual by wedgesacting between parts on the bar and projections on the mill housings,and a dumbturner plate separate from the carryingbar, means forseparately adjusting this plate relatively to the rolls irrespective ofthe adjustment of the carrying bar, and means for holding the dumbturnerplate on the upper surface of the carrying bar.

Two illustrative examples of the invention are shown on two accompanyiny sheets of explanatory drawings, Figure l, heet 1. being an elevationof the inner side of one headstock, and Figure 2 a sectional frontelevation showing arts of a three-roll sugar cane mill, sufficient toillustrate the first vention comprises essentially a carrying han$UGARCANE MILLS.

, 1922,. ,ISeIal 1470. 577,728.

example, whilst Figures 3 and 4. Sheet 2, j

are views similar to Figures l and 2, showing the second example.

According to the example shown in Figures 1 and 2, there is provided` adumblturner plate A which extends laterally ,bei `vond the usual flangeB on the upper roll B1 :of the mill, the plate having in its upper,surface a groove A1 into which the flange extends; The under surface ofthe plate A is inclined from vthe front upwards towards i the rear andrests on a counterpart inclined i portion@ on the upper surface of theusual carrying bar C1, being held on that bar by a number of transversedove-tailed ribs A2 on its under side, engaging counterpart (lovetailedslots C? in the top of the carrying bar.

Thedove-'tailed ribs and slots, whilst holding-the plate A on the barC1, permit of transversemovement of the plate relative to ijithebar, ashereinafter described. It is to i be understood that the ribs A2 andslots (l2 y.may he reversed if desired, that is, the ribs ,may be on thecarrying bar C1 and the slots iin theunderside of the dumbturner plateA. At each end of the dumbturner plate A there is formed on its uppersuuface a wedgey facieUA3 oppositelyj inclined to the inclination on theunder side of the plate, that is, ,it extends from the front downwardstowards the rear. With these upper surfacesI i there engage counterpartinclined wedges l) lying` between them and projections D1 ou i the`innerfaces of the housings. These ,wedges D have connected to theirforward sides rodsD2 extending out to the front of the mill Where theypass through brackets or lugs D3 on the housings. The rods are screwedat their outer ends and held in place by nuts D4 on opposite sides ofthe lugs D3.' Rods E also extend from the rear of the dumbturner plateat each end thereof to similar brackets or lugs El towards the rear ofthe housings. The outer ends of these rods are also screwed to receiveadjustin@r nuts and washers E2 on opposite sides of the lugs El. Thecarrying bar is of the fixed bar type and is adjustable relative to therolls as usual, by wedges (l carried by bolts G1 and acting betweeninclined parts on each side of each end of thc bar. and projections (ifon the housing of the mill` the carryingr bolts being adjustablyY heldin lugs G on the inner face of the housing.

When in use, and-the gapybetween the front lower roll H and the upperrol-l B1 has been adjusted in usual manner, and after the wedges (iholding the carryingbar Cl have been screwed up to hold that bar rigidas usuah the rodsE extending rearwards from the dumbturner plate A areadjusted until the forward knife edge on that plate is bearing on thesurface of the front roll H, then the wedges D bearing on the wedgefaces A3 on the opposite ends `of the upper side of the plate A are alsotightened up, ythis tends to impart a forward pull to the plate and thusensures that when the cane is passingr through between the lower andupper rolls there will be noy tendency for the cane to get between thelower front roll "H and the knife edge of the plate, and thus damage it;also, should the usual horizontal bolts (not shown) holding `theheadstock side caps J stretch when the mill is in use, as they may do,and thus alter the position of lthe front roll H relative to the plateA`r further adjustment of the dumbturner plate A itself is readilyeffected without stoppingr the mill, which it is necessary to do withexisting constructions (where the plate and l'its carryingr bar moveasone) iri order'to get below the mill to theubolts G1 carrying theusual adjusting wedgesG for the bar C1.

The example shown in Figures 3 and 4 diers from that hereinbe'foredescribed only in that instead of the dumbturner plate A being held onits carryingr bar C1 by dovetailed ribs A2 and slots C1, theplate Arests on the counterpart inclinedv portion C on the upper part of thecarrying bar C1, and it is held down on that bar by screwed rods Ktapped into the underside of the plate A and extending through slottedholes K1 in the carrying bar, the rods havingf on their ends nuts K2bearingr through awasher on the lower side of the bar. The slotted holesK1 permit of the limited relative movementbetween the dumbturner plate Aand its carrying bar Cl necessary when separately adjusting the plate Aas hereinbe fore described.

Vhat I claim is 1. In a dumbturner for sugar cane mills, having acarrying bar adjustably held by wedges acting between parts on the barand projections on the mill housing; a dumbturner plate separate fromthe carrying bar, means for separately adjusting this plate relative tothe rolls irrespective of thc adjustment of the carryingr bar1 and meansfor holding the dumbturner plate on the upper surface of the carryingbar.

2. In the dumbturner forming the subject matter of the foregoing claim7a plate. the'under surface of which is inclined from the front upwardstowards the rear, a counterpart inclined portion on the upper sur faceofthe carrying bar on which the plate rests, means for separatelyadjusting this plate relative to the rolls irrespective of theadjustment of the carryingr bar, and means for holding the dumbturnerplate on the upper surface of the carryingn bar.

3. In the dumbturner forming the subjectmatter of claim l hereof, meansfor holding the dumbturner plate on the upper surface of its carryinghar comprising counterpart dove-tailed ribs and slots in the undersideof the plate and in the top of the carrying bar.

4. In the dumbturner formingr the subjectmatter of claim l hereof, meansfor separately adjusting the plate relative to the rrolls irrespectiveof the adjustment of its carrying bar, comprising wedge faces in theupper surface of the plate at each end, inclined from the frontdownwards towards the rear, counterpart wedges engaging these Wedgefaces and engaging projections on the CHARLES MVNICIL.

